31fa1569c5
Prior to Spring Framework 5.2, some of our annotation utilities would not synthesize an annotation if it was already synthesized or not synthesizable (i.e., did not declare local aliases via @AliasFor and did not declare attributes that could override attributes in the meta-annotation hierarchy above the given annotation); however, we lost most of this functionality with the introduction of the new MergedAnnotations API. This commit revises the implementation of createSynthesized() in TypeMappedAnnotation so that, for invocations of MergedAnnotation.synthesize() and indirectly for invocations of AnnotatedElementUtils.findMergedAnnotation(), etc.: 1. An annotation that was previously synthesized will not be synthesized again. 2. An annotation that is not "synthesizable" will not be synthesized. For both of the above use cases, the original annotation is now returned from createSynthesized(). Closes gh-24861
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